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Batriscydmaenus Parker and Owens, New Genus, and Convergent Evolution of a "Reductive" Ecomorph in Socially Symbiotic Pselaphinae (Coleoptera: Staphylinidae)

Parker, Joseph and Owens, Brittany (2018) Batriscydmaenus Parker and Owens, New Genus, and Convergent Evolution of a "Reductive" Ecomorph in Socially Symbiotic Pselaphinae (Coleoptera: Staphylinidae). Coleopterists Bulletin, 72 (2). pp. 219-229. ISSN 0010-065X. https://resolver.caltech.edu/CaltechAUTHORS:20180711-153029593

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Abstract

We describe a new genus and new species of pselaphine rove beetle, Batriscydmaenus tishechkini Parker and Owens, from lowland Panamanian rainforest. The new taxon marks a radical departure from the basic pselaphine anatomical groundplan, with a globose body shape and a dramatic reduction of foveae, sulci and striae—features that are considered plesiomorphic in Pselaphinae. This overt simplification of the integument is typical of myrmecophile and termitophile taxa within Pselaphinae. A probable symbiotic lifestyle of members of Batriscydmaenus is further implied by their compact antennae and the presence of suberect, spatulate setae covering the dorsum. The convergent evolution of this trend towards character loss in inquilinous pselaphines implies a “reductive” ecomorph, specialized for living inside social insect societies in part by abandoning many cuticular features of free-living pselaphines. Batriscydmaenus represents possibly the most extreme manifestation of this ecomorph known to date. Reductive anatomy poses a challenge to taxonomic assignment, but we confirm molecularly that the genus belongs to the tribe Batrisini, using gene fragments amplified from a paratype.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1649/0010-065X-72.2.219DOIArticle
ORCID:
AuthorORCID
Parker, Joseph0000-0001-9598-2454
Additional Information:© 2018 The Coleopterists Society. Received: January 26, 2018; Accepted: April 19, 2018; Published: June 20, 2018.
Subject Keywords:taxonomy, myrmecophily, symbiosis, convergence, new species
Issue or Number:2
Record Number:CaltechAUTHORS:20180711-153029593
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180711-153029593
Official Citation:Batriscydmaenus Parker and Owens, New Genus, and Convergent Evolution of a “Reductive” Ecomorph in Socially Symbiotic Pselaphinae (Coleoptera: Staphylinidae). Joseph Parker and Brittany Owens. The Coleopterists Bulletin 2018 72 (2), 219-229
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87775
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:11 Jul 2018 22:45
Last Modified:24 Feb 2020 10:30

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